diff --git a/interface/CachingNLL.h b/interface/CachingNLL.h
index 6468bc1de4b..63ff92c58d3 100644
--- a/interface/CachingNLL.h
+++ b/interface/CachingNLL.h
@@ -169,6 +169,7 @@ class CachingSimNLL  : public RooAbsReal {
         void setData(const RooAbsData &data) ;
         virtual RooArgSet* getObservables(const RooArgSet* depList, Bool_t valueOnly = kTRUE) const ;
         virtual RooArgSet* getParameters(const RooArgSet* depList, Bool_t stripDisconnected = kTRUE) const ;
+        virtual bool getParameters(const RooArgSet* depList, RooArgSet& outputSet, bool stripDisconnected=true) const;
         void splitWithWeights(const RooAbsData &data, const RooAbsCategory& splitCat, Bool_t createEmptyDataSets) ;
         static void setNoDeepLogEvalError(bool noDeep) { noDeepLEE_ = noDeep; }
         void setZeroPoint() ; 
diff --git a/src/CachingNLL.cc b/src/CachingNLL.cc
index ea9cb831869..04f2bedf2c3 100644
--- a/src/CachingNLL.cc
+++ b/src/CachingNLL.cc
@@ -1285,6 +1285,14 @@ cacheutils::CachingSimNLL::getParameters(const RooArgSet* depList, Bool_t stripD
     return ret;
 }
 
+bool cacheutils::CachingSimNLL::getParameters(const RooArgSet* depList,
+                                                              RooArgSet& outputSet,
+                                                              bool stripDisconnected) const {
+  RooArgSet tempList = *getParameters(depList);
+  outputSet.add(tempList);
+  return true;
+}
+
 void cacheutils::CachingSimNLL::setMaskConstraints(bool flag) {
     double nllBefore = evaluate();
     maskConstraints_ = flag;